中国特种设备安全
中國特種設備安全
중국특충설비안전
CHINA SPECIAL EQUIPMENT SAFETY
2012年
10期
10-12
,共3页
尿素合成塔%内衬%腐蚀%规律
尿素閤成塔%內襯%腐蝕%規律
뇨소합성탑%내츤%부식%규률
Urea reactor%Lining%Corrosion%Law
本文归纳总结了水溶液全循环工艺尿素合成塔内衬腐蚀规律。研究表明使用超过13年的尿素合成塔内衬均匀腐蚀规律开始分化，个别塔内衬腐蚀加剧明显；而且尿素合成塔中偏上部筒节一般为剩余壁厚最薄的筒节，可通过适当调节该筒节塔盘间距或塔板筛孔数，减少该处局部反应时间，改善温度分布，延长整塔使用寿命。另外，多塔并联使用时，应注意管道分压导致各塔氧含量不均引发的不均匀腐蚀。
本文歸納總結瞭水溶液全循環工藝尿素閤成塔內襯腐蝕規律。研究錶明使用超過13年的尿素閤成塔內襯均勻腐蝕規律開始分化，箇彆塔內襯腐蝕加劇明顯；而且尿素閤成塔中偏上部筒節一般為剩餘壁厚最薄的筒節，可通過適噹調節該筒節塔盤間距或塔闆篩孔數，減少該處跼部反應時間，改善溫度分佈，延長整塔使用壽命。另外，多塔併聯使用時，應註意管道分壓導緻各塔氧含量不均引髮的不均勻腐蝕。
본문귀납총결료수용액전순배공예뇨소합성탑내츤부식규률。연구표명사용초과13년적뇨소합성탑내츤균균부식규률개시분화，개별탑내츤부식가극명현；이차뇨소합성탑중편상부통절일반위잉여벽후최박적통절，가통과괄당조절해통절탑반간거혹탑판사공수，감소해처국부반응시간，개선온도분포，연장정탑사용수명。령외，다탑병련사용시，응주의관도분압도치각탑양함량불균인발적불균균부식。
In this article, the statistical analysis for the corrosion law of urea reactor with water solvent and whole cycle process were carried out. It was indicated that the differentiation of corrosion law happened when service life of urea reactor exceeded 13 years. It was showed that the thin part of shell ring appeared in upper part and through the control of span and mesh number of tower tray, the service life of urea reactor would prolong. In addition, it was important to pay attention to non-uniform corrosion caused by non-uniform distribution of oxygen content when towers were parallel connection.
